Improvement in coal-stoves



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Q er @da C. S. DOOLITELL, OF MANSFIELH' OHIO.

Letters Patent No.-83,049, dated October 13, 1868.

HVIPROVEIVIENT IN COAL-STOVES.

The Schedule referred' to in these/Letters Patent and making part of the same.

To all whomit 'may conce/rin:

Be it known that I, C. S. DooLIrELL, of Mansfield, in the county of, Richland, and State of Ohio, have invented a new and improved Heater; and I do hereby- Figure l is a top view of my improved heater, part' of the top plate or cap being broken away.

Figure 2 is a vertical longitudinal section of the same.

Figure 3 is a horizontal section of the same, taken through the line :za-x, iig. 2.

Similar letters of reference indicate corresponding parts.

My invention has for its object to improve the construction of stoves, furnaces, and other heaters, insuch a Way as to utilize a larger proportion Iof .heat than is possible with heaters constructed in the ordinary manner; and it consists in the construction and combination of the various parts, as hereinafter more fully described.

A is the base of the heater, consisting of two compartments, al and a2. The inner compartment, which is directly below the bottom of the re-chamber, is the ash-pit, and also serves as a draught-chamber, through which air is introduced to support combustion, the

opening of said inner chamber a* being closed with a door or damper, so that the draught may be regulated at pleasure. The outer' compartment forms the coldair chamber, through which the air is introduced into the pipes or fines to be heated, and the sides of which should be made with numerous openings, to permit the free ingress of air .into said chamber.

B is the fire-chamber, in the bottom of which is placed a grate, secured and operating in the ordinary manner. The Walls of the nre-chamber B are made corrugated, as shown in g.^2, so as to present the largest possible radiating-surface. The fire-chamber B is so constructed and connected with the other parts that it may be easily removed, and replaced with a new one, when burned out. The fuel is introduced hito the fire-chamber B through a hopper-shaped spout in the part of the heater immediately above the said chamber B, as shown in fig. 2.

` C is a cold-air pipe leading up from an opening in thev bottom of the heater, through the central, part of the ash-pit al, and through the centralV part of the fire-chamber B, so that the current of air passing through said pipe may be exposedto the full heat of the re.

D are cold-air pipes, the lower ends of which open into the cold-air chamber cf-l which pass up along the outer sides of the {ire-chamber B in the depressions of the corrugations of the walls of said fire-chamber, so as to be as much as possibleexposed to the heat radiating from said walls.

The upper ends of the pipes D communicate with the lower ends of the attened ilues E, which are made cfa somewhat greater capacity than the pipes D. The upper ends ofthe attened ilues E communic-ate with openings formed in the upper part of the case F that siurounds the collection of flues E, and forius the outerwalls ofthe upper part of the heater, or with openings in the top or cap-plate, G, of said heater, or with openings in both places, as shown in rigs. l and 2.

H is a pipe, passing up through the middle of the upper part of the heater, and the lower end of which communicates with the upper end of the pipe ,0, so as to receive the heated air from said pipe O. v

Numerous slotsor openings are formed in the sides of the pipe H, opening into the flattened ilues E, so that the heated air in the said pipe H, and in the said ilattened flues E, maybecome thoroughly intermingled and be reduced to a uniform temperature.

I are air-pipes, leading up from the upper end of the pipe H, through the cap-plate G, for the passage of the heated air from the said pipe H into the'room` to be heated.

The egress-openings of the ues E and pipes I, or any desired number of them, may be connected with other rooms so as to heat them, and the direction in which the` heated air isf allowed to escape may be regulated and controlled, as desired, by meams o dampers suitably arranged.

The smoke and other products of combustion escape om the nre-chamber, B, through openings in the top of said fire-chamber, said openings -being so arranged l Y that an opening may be between each pair of adjacent attened lues, the said openingsandilues alternating with each other, as shown in iig. 3.

By this construction, the smoke and heated gases 'om the tire-chamber B surround the ilues E and pipe H within the exterior case F, so that all the heat l in said smoke and gases may be extracted and utilized by being communicated to the air passing through the flattened ilues E and pipe H, or radiated by the case -F into the room.

The smoke passes up into the smoke-chamber J, where it lstlikes directly against the cap-plate G, and passes out through the smoke-pipe K into the chimneyflue, the cap-plate G extracting and radiating into the room any heat that may still remain in the smoke.

If it should be found necessary to clean the fire- `tlues, I design to use an iron ring, fitting the inside of the coating, with a corrugated `ring attached to its inner surface, exactly conforming to the ilattened fines-E. This cleaner may be moved .up and down by'suitable rods. The ues could also be cleaned by simply raising the cap and operating from above.

When the heaterI is to be used asl a furnace exclu' sively, it should be surrounded with an external case in the ordinary manner, to collect and utilize the heat that may be radiated from the exterior of the heater. I claim as new, and desire to secure` by Letters Patent- 1. The arrangement of. the air-pipe O, fire-chamber B, slotted pipe H, and attened ues F,`Whereby the current of air entering the pipe C is, heated in its passage through-the fire-chamber, and distributed through the slotted pipe H into the series of flattened fines E, where it mingles with the cool air entering said iiues through the pipes D, as herein shown and described.

l 2. The fiattenedair-iines E, constructed as described and arranged inrespect to the outer case F and egress, draught openings of the fire-chamber B, substantially as herein shown and described, and'for the purpose set forth. 

